Question

What is the exponential equation for "125% decrease of initial value 8.2"?

Answer 1

$\bf \qquad \textit{Amount for Exponential Decay}\\\\ A=I(1 - r)^t\qquad \begin{cases} A=\textit{accumulated amount}\\ I=\textit{initial amount}\to &8.2\\ r=rate\to 125\%\to \frac{125}{100}\to &1.25\\ t=\textit{elapsed time}\\ \end{cases} \\\\\\ A=8.2(1-1.25)^t\implies A=8.2(-0.25)^t$

Answer 2

F(x)=8.2(0.25)^x

That should be correct . If it is, please mark brainliest! Hope it helped!